What are access control programs for Linux?

Question

linux

Hello, we really need programs for Linux to prohibit access to some sites (on a computer, not through a router), and to limit the time spent in some applications, the beginner Linuxoid himself, plz throw in the comments the names of the software

Answer 1

bash scripts (for time limit) and local hosts (for ban sites) %)

Answer 2

Watch programs with parental controls